@charset "UTF-8";
@function px2vh($height:0, $base:1500){
  @return ($height/$base * 100) + vh;
}
@mixin wh($width:0, $height:0) {
  width: $width + px;
  height: $height + px;
}

@mixin lt($left:0, $top:0) {
  position: absolute;
  left: $left + px;
  top: $top + px;
}

@mixin lb($left:0, $bottom:0) {
  position: absolute;
  left: $left + px;
  bottom: $bottom + px;
}

@mixin rt($right:0, $top:0) {
  position: absolute;
  right: $right + px;
  top: $top + px;
}

@mixin rb($right:0, $bottom:0) {
  position: absolute;
  right: $right + px;
  bottom: $bottom + px;
}

@mixin abs_top($top:0) {
  position: absolute;
  left: 0;
  right: 0;
  top: $top + px;
  margin: auto;
}

@mixin abs_bottom($bottom:0) {
  position: absolute;
  left: 0;
  right: 0;
  bottom: $bottom + px;
  margin: auto;
}

@mixin abs_center() {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
}

$addHeight: 30;